| 14:00-15:30 in MS 5233 Clint Conley Limits Superior and Countably Chromatic Ideals Abstract. We discuss how the machinery behind Miller's recent
(classical) proof of the G_0 dichotomy can be modified to grant
Komjath-Laczkovich-style limsup dichotomies. In particular, this
gives a classical proof of Gao-Jackson-Kieftenbeld's "sequential"
generalization of Silver's theorem concerning the number of
equivalence classes of a coanalytic equivalence relation. Time
permitting, we will also discuss obstacles preventing a similar
"sequential" generalization of the G_0 dichotomy itself.
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